Domain Overview
DNS: ✓ 2mo ago
Checker: ✓ 2mo ago
zwillingus.com
Yes
✓ Yes
Outlook
No
No
⚠ Yes
No
No
Checked via [email protected]
· 2026-03-27 22:00:42 UTC · ↺ Refresh
MX Hostnames
- zwillingus-com.mail.protection.outlook.com
MX Priorities
- zwillingus-com.mail.protection.outlook.com: 0
A / AAAA Records
- 209.17.116.163 (no PTR)
Mail Server IPs
- 52.101.73.1 ↩ mail-am3pr04cu00501.inbound.protection.outlook.com
- 52.101.68.29 ↩ mail-dbapr03cu00105.inbound.protection.outlook.com
- 52.101.68.39 ↩ mail-db7pr03cu00607.inbound.protection.outlook.com
- 52.101.73.15 ↩ mail-am9pr04cu00107.inbound.protection.outlook.com
- 2a01:111:f403:ca09::d ↩ mail-as9pr05cu01305.inbound.protection.outlook.com
- 2a01:111:f403:ca04::5 ↩ mail-db3pr0202cu00205.inbound.protection.outlook.com
- 2a01:111:f403:ca04::c ↩ mail-db9pr02cu00204.inbound.protection.outlook.com
- 2a01:111:f403:ca04::e ↩ mail-db8pr02cu00106.inbound.protection.outlook.com
SOA Record
Raw SOA
ns99.worldnic.com namehost.worldnic.com 126021311 10800 3600 604800 3600
Primary NS (mname)
ns99.worldnic.com
Admin Email (rname)
namehost@worldnic.com
Serial
126021311
Refresh
10800s
Retry
3600s
Expire
604800s
Minimum TTL
3600s
Nameservers (NS)
ns99.worldnic.com
ns100.worldnic.com
SPF Record
✓ Soft Fail (~all)
v=spf1 include:spf.protection.outlook.com include:spf.mtasv.net include:amazon.com include:email.freshdesk.com include:_spf.elasticemail.com include:_spf.salesforce.com include:mailgun.org include:amazonses.com ~all
📊 DNS lookups: 8/10
~ Soft fail (~all) — moderate enforcement
DMARC Record
✗ p=none
v=DMARC1; p=none; rua=mailto:[email protected]; ruf=mailto:[email protected]; fo=1
⚠ p=none — monitoring only, no enforcement
📋 SPF alignment: Relaxed
· DKIM alignment: Relaxed
📧 Reports → mailto:[email protected]
DKIM Selectors
✓ 2 found
selector1._domainkey
selector2._domainkey
✓ Public key: 392 chars (valid)
✓ DKIM properly configured for selector: selector1
Checked: google, selector1/2, default, mail, dkim, k1, s1/2, zoho, sendgrid, mxvault, amazonses
All TXT Records
8 records- 4r8be0la7o37rclb4caaekhokc
- mailo._domainkey.ext.zwillingus.com
- duo_sso_verification=NE6lEeUIMhbXu55M3HmLo2Biru6zoaMoQN1PWwCCflSGRBFgWhwfdlpmAWeoNIdV
- atlassian-domain-verification=miVJKZ7BzbiaYpnfWcWky9DOq8aKmDOnEqgroHDw6Ycs9/ewGLcub8kdTEAisnF4
- reviews
- SPFv=spf1 include:spf.protection.outlook.com include:spf.mtasv.net include:amazon.com include:email.freshdesk.com include:_spf.elasticemail.com include:_spf.salesforce.com include:mailgun.org include:amazonses.com ~all
- e5sbttl37ucd9ue1tc59l5m4va
- MS=ms78274965
Full email verification for zwillingus.com
Run SMTP check, SPF/DKIM/DMARC and catch-all detection.
SPF / DKIM / DMARC Get 1,000 Free Credits